Hoisting-bucket.



F. W. BOND. HOISTING BUCKET.

APPLICATION FILED 1130.9, 1912.

Patented June 9,1914.

2 SHEETS-SHEET 1.

INVENTIJR br t ATTURNEYE:

COLUMBIA PLANOCIRAPN CO-. WASHINGTON. D. C.

F. W. BOND HOISTING BUCKET.

APPLICATION FILED 111:0. a, 1912.

Patented June 9, 1914.

2 SHEETS-SHEET 2.

INVENmR bra/ W ATTURNEYEJ.

UNITED STATES PATENT. OFFICE.

FREDERICK W. BOND, OF BUFFALO, NEW YORK.

HOISTING-BUCKET.

Application filed December 9, 1912.

To all whom it may concern:

Be it known that I, FREDERICK IV. Bonn, a citizen of the United States,residin at Buffalo, in the county of Erie and tate of New York, haveinvented new and useful Improvements in Hoisting-Buckets, of which thefollowing is a specification.

The invention relates to a bucket for hoist ing machines and moreparticularly to buckets of that type which are generally known as grabbucketsin whichtwo scoops are pivotally connected with each other. andadapted to open and closefor discharging or receiving a load and whichare operated by means of a tackle comprising a lifting line adapted toclose the scoops of the bucket and transport the load from one place toanother and a holding line which supports the bucket while the liftingline is relaxed for the purpose of permitting the scoops to open anddischarge the load therefrom. l n buckets of this type as heretoforeconstructed the space within these scoops has usually been obstructedmore or less by the pivotal connections between the scoops and otherparts so that the capacity of the bucket was limited and interferenceoccurred when loading of the bucket and also whendischarging the loadtherefrom.

One of the objects of this invention is to produce a bucket of thischaracter in which the space within the scoops is free of obstructionsso that the same is capable of taking on a maximum load and also avoidin terference with loading and dumpingof the bucket.

Another object of this invention is to so construct the bucket that theopening movement of the scoops will be positively limited and the edgesof the latter will occupy a definite position while engaging the loadand thereby permit of scooping up the maximum amount of material to betransported.

Another object of this invention is to so arrange the lifting line andthe pulleys around which the same passes that the pull.

on this line is always in a directionwhich will cause the same to runproperly on or off the pulleys or sheaves and without liability of thisline becoming fouled or disarranged.

A further object of this invention is to permit of constructing thebucket mainly of sheet metal and angle and channel irons which arealways carried in stock and thus permit of constructing the bucketwithout Specification of Letters Patent.

Patented June 9, 1914. Serial No. 735,599.

making specialv castings and thereby reduce the cost of construction.

A still further object of this invention is to so arrange thecounterbalancing weights of the bucket that these weights may be readilyincreased or decreased accordingto the length of the lifting and holdinglines which are associated with the bucket.

In the accompanying drawings consistin of 2 sheets: Figure l is a sideelevation o a hoisting or grab bucket constructed in accordance with myinvention, the same being shown in a closed position. Fig. 2 is a sideelevation of the same, partly in section, the same being shownin an openposition. Fig 3is an end view of the bucket in a closed position andpartly in section, the sectional part being taken approxin'iately inline 33, Fig. 1.. Fig. 4 is a bottom plan view of the head of thebucket. Fig. 5 is a diagrammatic perspective view of the two branches ofthe lifting line of the bucket and the various sheaves or pulleys on thebucket around which the same passes. Fig. 6 is a fragmentary horizontalsection taken in line 66, Fig. 1.

Similar characters of reference indicate corresponding parts throughoutthe several views.

In its general organization my improved bucket comprises two scoopswhich are pivotally connected so that they can swing vertically towardand from each other, a supporting head or frame arranged above thescoops, two arms, links or hangers which are pivotally connected attheir upper ends with the under side of the supporting head while theirlower ends are pivotally connected respectively with the scoops alifting tackle operating to close the scoops and lift the load withinthe same, and a holding tackle operating to hold the head of the scoopwhile the lifting tackle is relaxed to perinit1 the scoops to open anddischarge the oac.

The supporting head may be variously constructed but as shown in thedrawings the same is built up of stock angle andchannel irons and sheetmetal plates which are readily available and comprises two pairs oflongitudinal channel bars 1, 1 arranged cured transversely to theunderside of the by means of a longitudinal pintle or pivot scoop sidewalls.

channel irons at opposite ends thereof, and

vided with reinforcing bands 7 secured, to

the outer sides of the scoops by rivets, as shown or otherwise, andhaving their inner edges chamfered so as to present cutting edges andthereby enablethe scoops to dig more readily into the pile of ore, sandor other materialwhich is to be transported.

The upper edge of each side wall of each scoop is preferablyreinforcedby a pairof inner and outerreinforcing plates 8, 9 secured respectivelyto the inner and outer sides of the respective upper edge ofone of thescoops by means of rivets or otherwise. The outer ends of thesereinforcing plates are provided with openings which coincide withan'opening in the adjacent part of the respective side wall of the scoopand forman-eye 10 whereby this part of the scoop is pivotally connectedwith'one of the suspen sion arms, links or hangers in a manner whichwill presently appear.

Each of the suspension links or hangers may be variously constructed butthe same preferably comprises two upright side bars -11 "having theirlower ends arranged 'adja-' cent to the inner sides of the two uprightwalls of one ofthe scoops and transverse braces 12 connecting the twoside bars so that the latter and the braces form a rigid structure. barsof one of the suspension links or hangers are pivotally connectedwith-the outer parts of the side walls of one of the scoops rod 13passing through eyes or openings in the lower endsat the companion sidebars of the link and through the eyes 10 formed by the openings in theouter ends of the reinforcing plates and the adjacent parts of the Theouter ends of the pivot rod 13 are provided with heads 14 bearingagainst the outer reinforcing plates so that spreading of the bucket isprevented and the lower ends of the link side bars areheld against theinner reinforcing plates by means of a spacmg sleeve 15 surrounding theintermed ate part of the pivot rod and bearing at its opposite endsagainst the inner sides of the companion link bars, as

The lower ends of the. two side the bucket, this being preferablyeffected by arranging the upper ends of the side bars of each linkbetween the members of the pairs of angle irons 3 and passing pivot pins16 horizontally through the vertical flanges of each pair of these angleirbns and through eyes 17 at the upper ends of the link side bars asshown in Figs. 1, '2 and 3.

The inner ends of the reinforcing plates at the upper edges of thescoops lap over each other and are pivotally connected for which purposethe inner ends of the two reinforcing plates of one vertical wall of onebucket are arranged close together while the inner ends of thereinforcing plates on the upper edge of the corresponding wall of theother scoop are spread apart sufiiciently to receive the companion innerends of the reinforcing plates of the other scoop, as shown in Fig, 6.The overlapping inner parts of the reinforcing plates on thecorresponding edges of the two scoops are provided with coincidingopenings or eyes 18 which receive a horizontal longitudinal pivot pin 19whereby the two scoops are pivotally conn-ected so that they can swingvvertically toward and from each other when opening and closing thebucket. Above the upper edges of the corresponding side walls of thescoops are arranged two pulley blocks each of. which is also preferablyconstructed of sheet metal and comprises two sections whichare arrangedonopposite sides of the corresponding side walls of the bucket. Eachsection of a pulley block consists of an upright inner plate 20 which isstraight throughout its length, and an outer upright plate having aninwardly deflected lower part 21 which 1 tervening space between theupper ends of the inner and outer plates of one pulley block section.Between the upper parts of the two inner plates of the two pulley blocksections is arranged a weight which is adapted to counterbalance theweight of the lifting and holding lines whereby the bucket is operated.This counterbalancing weight is preferably constructed of a plurality ofmetal plates 23 which are. arranged side by side and secured together bymeans of rivets or otherwise; The upper parts of the two sections of thepulley block-and the intervening plates of the counter-weight aresecured together by means of tie bolts or rods 24 passing horizontallythrough these several members as shown in Fig. 3, and the nner and outerplates of each section of the pulley block are held theproper distanceapartat the upper ends thereof by means of spacingsleeves 25" arrangedupon the tie rods 24 between the upper parts of each section of thepulley block. By spreading the sections of the pulley block more or lessand varying the number-of plates which go to make up the thickness ofthe counterbalancing weight it is possible to adapt the counterbalancingeffect of this weight to suit the length of lifting and holding lines inthe lifting and holding tackle with which the bucket is associated.

At their lower ends the inner and outer plates of the two sections ofthe pulley block are provided with openings which coincide with theopenings at the inner ends of the reinforcing plates on the scoop sidewalls and receive the ends of the pivot pin so that the latter serves topivotally connect the respective walls of the scoops with each other aswell as with the lower end of the companion pulley block.

In the spaces between the upper parts of the inner and outer plates ofeach pulley block section are arranged a pair of inner and outer liftingpulleys or sheaves 26, 27, the same being axially in line and pivotallyconnected with each other and with the pulley block and counterbalancingweight by a horizontal pivot pin 28 passing through these pulleys andthe adjacent upper parts of the pulley block sections andcounter-weight, as shownin Figs. 1, 2 and 3.

At its opposite ends the supporting frame or head is provided with fourintermediate pulleys or sheaves 29, 29, 30, 30, a pair at each end, themembers of each pair being pivoted, respectively, between the members ofa pair of the channel irons or bars 1, 1, and the outer sides of theperipheries of each pair of intermediate pulleys being vertically inline with the horizontally opposite sides of the outer lifting pulley orsheave 27 of the companion pulley block.

31, 31 represent a pair of leading sheaves or pulleys pivoted on thecentral part of the supporting head, one between one pair of channelirons and in line with one member of one pair of intermediate pulleysand the other between the other pair of channel irons and in line withone member of the other pair of intermediate pulleys. On its undersidethe supporting head is provided with two guide pulleys or wheels 32which are arranged below the diagonally opposite wheels 29, andattaching members arranged below the diagonally opposite pulleys 30. Oneof the guide pulleys 32 has its operative part verticallyin line withthe adjacent side of the periphery of an inner pulley blocksheave 26while the companion attaching member 33 is vertically in line with theopposite side of the periphery of said inner pulley block sheave.

34, 34 represent the branches of a lifting line which may be constructedin the form of a cable, rope or the like. One of these branches isattached to one of the attaching members 33 and passes thence downwardlyand around the underside of one of the inner liftingpulleys or sheaves26, thence upwardly and inwardly around the adjacent guide pulley 32,thence upwardly and outwardly overthe adjacent intermediate pulley 29 ofone pair, thence downwardly and laterally underneath the adjacent outerlifting pulley or sheave 27, thence upwardly and inwardly over the otherintermediate pulley 30 and thence underneath the companion leadingpulley 31. and upwardly to the main part of this line running to thelift ing drum of the hoisting engine or mechanism. The other branch ofthe hoisting line connects at one end with the other attaching member 33and passes thence successively around the pulleys 26, 32, 29, 27, 30, 31the mainpart of this lifting line running to the hoisting machine in thesame manner as that just described with reference to the other branch ofthe lifting line.

35, 35 re n-esont the two branches of the holding line of a holdingtackle which connects with the two pairs of channels of the supportinghead and which hold the same fixedly while the lifting line is relaxedto permit the scoops to swing apart for discharging a load and remainopen prepara tory to taking up another load. This opening of the scoopsis effected automatically when the lifting line is relaxed owing to theweight of the scoops which normally tend when free to swing with theircentral parts downwardly so that the mouth of the bucket is open. Thisopening of the bucket is facilitated by the load in the same and whenempty the weights 23, 23 operate to counterbalance the lifting line andaid in causing the scoops to swing downwardly into an open position.This opening movement is limited and arrested when the bottoms of thescoops are in a vertical position or substantially so by providing theopposite sides of the counter-balancing weights with stop faces 3(3, thefaces on each weight converging downwardly and being engaged by theupper edges of the adjacent scoop side walls and the reinforcing platesthereof, as shown in Fig. 2, whereby the scoops are rigidly held indefinite position relatively to each other: while the bucket is loweredinto engagementwith the material to be excavated or transferred.

Upon drawing on the lifting line while the scoops of the bucket engagethe material the scoopsare caused to approach each other and pick upbetween them a charge of the material with'which they engage and afterthe two scoops engage each other and the bucket is closed the continuedpull on the lifting line causes the bucket with its load to be lifted.\Vhile the scoops are thus closing the branches of the lifting line passaround the pulleys or sheaves of the head and pulley block with a directlead and without liability of the lines running oif the pulleys orbecoming fouled, thereby facilitating the handling and operation of thebucket. hen the loaded bucket has been moved to the desired place thehead is held fixedly by the holding line and the lifting line is relaxedto permitthe scoops to open and discharge the load. Owing to the absenceof any obstruction between the scoops at the pivotal connection betweenthe same there is no interference of the bucket with the load" and it ispossible to lower the scoops in a fully open position and pick up a loadwhich may project a considerable distance upwardly beyond the pivotalconnection between the scoops. 7

By reason of the fact that the principal parts of this bucket consist ofangle iron, channel iron and metal plates which are always carried instock in mills it is possible to produce these buckets at comparativelylow cost.

I claim as my invention:

1. A hoisting bucket comprising two scoops which have their inneropposing parts pivotally connected and pulley blocks pivotally connectedrespectively with the inner parts of saidscoops, each of said pulleyblocks comprising two sections each of which consists of an innerupright plate which is straight throughout the length thereof and anouter plate which has its lower part de flected inwardly and secured tothe lower part of the companion inner plate while its upper part isdeflected outwardly so as to form an intervening space between the sameand the adjacent outer part of the inner plate, and a pulley pivotallymounted in each of said spaces between the upper parts of the plates ofeach of said sections.

2. A hoisting bucket comprising two scoops which have their inneropposing parts pivotally connected and pulley blocks pivotally connectedrespectively with the inner parts of said scoops, each of said pulleyblocks comprising two sections each of which consists of an innerupright plate which is straight throughout. the length thereof and anouter plate which has its lower part 'deflected inwardly and securedtothe lower part of the companion inner plate while its upper-part'isdeflectedoutwardly so as to form an intervening space between the sameand the adjacent outer part of the .inner plate, and a pulley pivotallymounted in each of said spaces between the upper parts of the plates ofeach of said sections, and a counterbalancing weight mounted on eachpulley block between the upper parts of the inner plates thereof; a r V3. A hoisting bucket comprising two scoops which have their inneropposing parts pivotally connected and pulley blocks pivoteach of saidspaces between the upper parts of the plates of each of'said sections,and a counterbalancing weight mounted on each pulley block between theupper parts of the inner plates thereof and composed of a pluralit-y ofplatesarranged side by side;

4. A hoisting bucket comprising two 7 scoops which have their inneropposing parts pivotally connected and pulley blocks pivotally connectedrespectively with-the inner. parts of said scoops, each, of said pulleyblocks comprising two sectionseac'h of which consists of an innerupright plate which is straight throughout the length thereof and anouter plate which has its lower part deflected inwardly and secured tothe lower part of the companion inner plate while its upper part isdeflected outwardly so as to form an intervening space bet-ween the sameand the adjacent outer;part of the inner plate, and a pulley pivotallymounted in" each ofsaid spaces between the upper partsv of the plates ofeach of said sections, and a counterbalancing weight mounted. on eachpulley block between the upper parts of the inner plates thereof andhaving its opposite sides constructed to form stops for engagement bythe adjacent upper edges of the scoops for limitingthe opening movementthereof;

5. A hoisting bucket comprising two scoops which have theirinneropposing parts pivotally connected and pulley blocks pivotally connectedrespectively with the inner parts of said scoops, each of'said pulleyblocks comprising two sections each of which consists of an innerupright plate which is straightthroughoutthe vlength thereofand an outerplate which has its lower part deflected inwardly and secured to thelower part of the com anioninner plate while its upper part is deflected outwardly so as to form an intervening space between the sameand theadjacent outer part-of the inner plate, and a'pulley pivotallymounted in each of said spaces between the upper parts of the platesofeach-of said sectionspand a counterbalancing weight'mounted on eachpulley block between the upper parts of'the inner plates thereof andhaving its opposite sides constructed to form downwardly'convergingstops for engagement by the adjacent upper edges of the scoops forlimiting the opening movement thereof.

6. A hoisting bucket comprising a pair of scoops each of which has ahorizontal bottom and two upright side walls at opposite transverseedges of the bottom, a pivotal connection between the inner edges of thecorresponding side walls of both scoops, a supporting head arrangedabove said, scoops, suspension links pivotally connecting said head withthe outer parts of said scoops, and a lifting tackle comprising pulleyblocks each connected with the pivot connecting two walls of the scoopsand each having inner and outer lifting pulleys, two pairs ofintermediate pulleys arranged on the sup porting head at opposite endsthereof and the members of each pair having the outer sides of theirperipheries vertically in line with horizontally opposite sides of theperiphery of the outer lifting pulley of one of the pulley blocks, twoguide pulleys mounted on the supporting head adjacent to one pair ofdiametrically opposite intermediate pulleys, attaching members mountedon the sup porting head adjacent to the other pair of diametricallyopposite intermediate pulleys, two leading pulleys mounted on thecentral part of the head and each arranged in line with an intermediatepulley which is ad j acent to an attaching member, and a lifting linehaving two branches each of which is connected at one end with one ofsaid atl taching members and passes from thence successively around theinner lifting pulley, thence around the adjacent guide pulley, thencearound the intermediate pulley adjacent to the guide pulley, thencearound the outer lifting pulley, thence around the intermediate pulleyadjacent to the companion attaching member, and thence around thecompanion leading pulley.

7. A hoisting bucket comprising two scoops which have their inneropposing parts pivotally connected, links pivotally connected. at theirlower ends with said scoops, a supporting head pivotallv connected withthe upper ends of said lllllis' and comprising two pairs of longitmlinalchannels ar anged parallel and the members of each pair being separatedby intervening spaces, and transverse plates secured to the upper andlower sides of said channels, and a lifting;

tackle comprising pulley blocks pivotally connected with said scoops andeach having lifting pulleys, intermediate and leading pulleys mounted onsaid head between the channels of each pair, and a lifting line havingbranches connected with the head and passing around correspondinglifting, intermediate and leading pulleys.

\Vitness my hand this 4th day of December,1912.

FREDERICK W. BOND. \Vitnesses:

THEO. L. Porn, ANNA Hnrers.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

